\begin{table}
\centering
\caption{Meta analysis (Figure 3) in table form. \label{tab:meta}}
\centering
\resizebox{\ifdim\width>\linewidth\linewidth\else\width\fi}{!}{
\begin{tabular}[t]{lrrrrrrrrrrrrrrrr}
\toprule
\multicolumn{1}{c}{ } & \multicolumn{4}{c}{Democratic Peace} & \multicolumn{4}{c}{Audience Costs} & \multicolumn{4}{c}{International Law} & \multicolumn{4}{c}{Reciprocity (FDI)} \\
\cmidrule(l{3pt}r{3pt}){2-5} \cmidrule(l{3pt}r{3pt}){6-9} \cmidrule(l{3pt}r{3pt}){10-13} \cmidrule(l{3pt}r{3pt}){14-17}
Samples & Estimate (DP) & SE (DP) & P value (DP) & N (DP) & Estimate (AC) & SE (AC) & P value (AC) & N (AC) & Estimate (IL) & SE (IL) & P value (IL) & N (IL) & Estimate (FDI) & SE (FDI) & P value (FDI) & N (FDI)\\
\midrule
Brazil & -0.21 & 0.05 & 0.00 & 3060 & -0.87 & 0.08 & 0 & 2004 & -0.25 & 0.05 & 0.00 & 3053 & 0.50 & 0.05 & 0.00 & 3059\\
Germany & -0.24 & 0.05 & 0.00 & 3000 & -0.91 & 0.08 & 0 & 1951 & -0.08 & 0.05 & 0.08 & 3005 & 0.29 & 0.04 & 0.00 & 3013\\
India & -0.01 & 0.05 & 0.82 & 3075 & -0.29 & 0.09 & 0 & 2019 & -0.09 & 0.05 & 0.05 & 3070 & 0.29 & 0.05 & 0.00 & 3072\\
Israel & -0.33 & 0.04 & 0.00 & 3072 & -0.75 & 0.07 & 0 & 2089 & -0.14 & 0.04 & 0.00 & 3080 & 0.55 & 0.04 & 0.00 & 3068\\
Japan & -0.10 & 0.04 & 0.02 & 3056 & -0.65 & 0.07 & 0 & 2029 & -0.11 & 0.04 & 0.01 & 3063 & 0.08 & 0.04 & 0.03 & 3064\\
\addlinespace
Nigeria & -0.09 & 0.05 & 0.11 & 3130 & -0.52 & 0.09 & 0 & 2079 & -0.44 & 0.05 & 0.00 & 3137 & 0.98 & 0.05 & 0.00 & 3137\\
USA & -0.24 & 0.05 & 0.00 & 3019 & -0.64 & 0.08 & 0 & 2012 & -0.23 & 0.05 & 0.00 & 3023 & 0.42 & 0.05 & 0.00 & 3019\\
All Countries & -0.18 & 0.04 & 0.00 & 21412 & -0.66 & 0.08 & 0 & 14183 & -0.19 & 0.05 & 0.00 & 21431 & 0.44 & 0.11 & 0.00 & 21432\\
Original (USA) & -0.40 & 0.08 & 0.00 & 1271 & -1.36 & 0.19 & 0 & 451 & -0.20 & 0.07 & 0.00 & 2792 & 0.14 & 0.01 & 0.00 & 2763\\
\bottomrule
\end{tabular}}
\end{table}
